TableScanState.h

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#ifndef EXECUTION_TABLESCANSTATE_H
#define EXECUTION_TABLESCANSTATE_H
 
#include "tdb.h"
 
#include "execution/PlanExecState.h"
#include "plan/TableScan.h"
#include "storage/Table.h"
 
namespace taco {
 
class TableScanState: public PlanExecState {
public:
    ~TableScanState() override;
 
    void node_properties_to_string(std::string &buf, int indent) const override;
 
    void init() override;
 
    bool next_tuple() override;
 
    std::vector<NullableDatumRef> get_record() override;
 
    void close() override;
 
    void rewind() override;
 
    Datum save_position() const override;
 
    bool rewind(DatumRef saved_position) override;
 
    const PlanNode*
    get_plan() const {
        return m_plan;
    }
 
private:
    TableScanState(const TableScan *plan, std::unique_ptr<Table> table);
 
    const TableScan *m_plan;
 
    bool m_extracted;
    bool m_at_end;
    std::unique_ptr<Table> m_table;
    Table::Iterator m_tabiter;
    std::vector<Datum> m_fields;
 
    friend class TableScan;
};
 
}    // namespace taco
 
#endif